Couple of my favorites are:
Soft Corals and Sea Fans
By K. Fabricius and P. Alderslade
272 pages
Coral Reef Ecology (Ecological Studies, V. 102)
by Yuri I. Sorokin
Springer Verlag; ISBN: 3540605320; (December 1995)
The Ecology of the Indonesian Seas : Chapters 1-12 (The Ecology of Indonesia Series , Vol 7, Part 1)
by Tomas Tomascik (Editor), Anmarie J. Mah
Charles E Tuttle Co; ISBN: 9625930787; (November 1997)
The Ecology of the Indonesian Seas : Chapters 13-23 (The Ecology of Indonesia Series , Vol 8, Part 2)
by Tomas Tomascik, Anmarie J. Mah, Anugerah Nontji, Mohammad ka Moosa
Periplus Editions; ISBN: 9625931635; (January 1998)
Plankton Culture Manual
by Frank H. Hoff
Publisher: Florida Aqua Farms Inc; ISBN: 0966296001; 5th Rev edition (July 1999), 160 pages
Marine Plants of the Caribbean : A Field Guide from Florida to Brazil
by Diane Scullion Littler, Mark M. Littler, Katina E. Bucher, Norris, James N. Norris
Publisher: Smithsonian Institution Press; ISBN: 0874746078; (September 1992), 272 pages
Corals of the World
By J.E.N. Veron, author, and Mary Stafford-Smith, scientific editor and producer
ISBN numbers
volume 1: 0 642 32236 8
volume 2: 0 642 32237 6
volume 3: 0 642 32238 4